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8 Cards in this Set
- Front
- Back
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chromosome sex determination
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mammals -> 2nd x or Y
birds -> reverse mammal situation, zz male, zw female flies -> ratio of x chromosome to autosome bees -> haploids-male, diploids-female |
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sex chromosome abnormalities female
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turner syndrome-> xo
meta females -> xxx superfemales -> xxxx... |
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sex chromosome abnormalities male
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klinfelter syndrome -> xxy
supermale -> xyy |
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differentiation into male
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sertoli cells -> testis cords -> extend deep into connective tissue -> form internal network s of sex cords and thin rete testis -> lose contact with surface epithelium -> separated by thick extracellular matrix -> become tunica albuginea
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primary sex determination
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determination of gonads
strictly chromosomal no environment |
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testis-determining factor
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organizes gonad into testis rather than ovary
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secondary sex dtermination
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phenotype outside the gonads
determined by hormone |
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developing gonads
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usually organ primordia only develop into one organ type
not true for gonads -> can develop into either ovary or testis bipotential stage -> neither male or female |
